【springMVC 将对象通过responseBody转换成json】

最新推荐文章于 2023-07-30 00:33:06 发布

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最新推荐文章于 2023-07-30 00:33:06 发布

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分类专栏： springmvc

本文链接：https://blog.youkuaiyun.com/smile3322/article/details/108446840

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通过在方法上使用注解`@ResponseBody`，SpringMVC会将返回的对象序列化为HTTP响应体。该注解也支持在类级别上使用，适用于所有控制器方法。此外，可以结合Jackson JSON库进行JSON序列化视图配置。

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@ResponseBody

You can use the @ResponseBody annotation on a method to have the return serialized to the response body through an HttpMessageConverter. The following listing shows an example:

Java

@GetMapping("/accounts/{id}")
@ResponseBody
public Account handle() {
    // ...
}

@ResponseBody is also supported at the class level, in which case it is inherited by all controller methods. This is the effect of @RestController, which is nothing more than a meta-annotation marked with @Controller and @ResponseBody.

You can use @ResponseBody with reactive types. See Asynchronous Requests and Reactive Types for more details.

You can use the Message Converters option of the MVC Config to configure or customize message conversion.

You can combine @ResponseBody methods with JSON serialization views. See Jackson JSON for details.

ResponseEntity

ResponseEntity is like @ResponseBody but with status and headers. For example:

Java

@GetMapping("/something")
public ResponseEntity<String> handle() {
    String body = ... ;
    String etag = ... ;
    return ResponseEntity.ok().eTag(etag).build(body);
}

Spring MVC supports using a single value reactive type to produce the ResponseEntity asynchronously, and/or single and multi-value reactive types for the body.

Jackson JSON

Spring offers support for the Jackson JSON library.

以上为spring官网原文

<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
<!--    <dependency>-->
<!--      <groupId>com.fasterxml.jackson.core</groupId>-->
<!--      <artifactId>jackson-core</artifactId>-->
<!--      <version>2.11.2</version>-->
<!--    </dependency>-->
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
<!--    <dependency>-->
<!--      <groupId>com.fasterxml.jackson.core</groupId>-->
<!--      <artifactId>jackson-annotations</artifactId>-->
<!--      <version>2.11.2</version>-->
<!--    </dependency>-->
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
<!--    <dependency>-->
<!--      <groupId>com.fasterxml.jackson.core</groupId>-->
<!--      <artifactId>jackson-databind</artifactId>-->
<!--      <version>2.11.2</version>-->
<!--    </dependency>-->